Impervious bag.



M. SMBTANA. vIMPBRVIOUS BAG. APPLICATION FILED `JUNE 25,1913.

Patented. Ap1"x.77 1914,

Ff'jarfajeneu. FIL; m.

v wwwmgmmm 'l MAXIMILIAN SMETANA, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- HALF T0 WILLIAM C'. WIT'IMAN, OF PHILADELPHIA, PENNSYLVANIA.

o rnrnnvrous Bae."

noaaeoi;

, Specication onf Letters Patent.

Patented Apr. "3', MIMI..

Application filed June 25, 19313. Serial No. 775,652.

"To all whom it may concern:

Beit known that I, MAxrMiLIAN SMETANA, subj ect of the Emperor of Austria-Hungary, and resident of Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented an Improvement in Impervious Bags, of which the following is a specification; r-

The objectl of my invention is to provide a construction of impervious bag, sultable for storing and shipping hydraulic cement,lime and substances in loose form which have moisture absorptive or deliquescent properties which result in the deterioration of the material unless it is kept in a thoroughly dry condition.

In the use of Portland or other hydraulic cement, for example, the necessity of storing thesame in large quantities forlong periods of time and the transportation of it over long distances, under more or less exposed conditions,and the commercial use of the cement in building operations where the bags are exposed to the inclement Weather condi/l tions which cannot Well be guarded against, the moisture absorbed soon renders -the cement unfit for use; and if these conditions are guarded against, the cost becomes prohibitory. By the Vuse of my improved bag,

the cement may be preserved for long peri-` ods of time under the. most adverse condiqualit-ies.

. Moreover, my object is also to so form thel bag that it will withstand the roughest usage without danger of rupture of the moistureproofenvelop or container.

vl-,velop or ba My. invention consistsrof a fabric outer bag, which may be of coarse textile material of inexpensive constructiomcombined with a specially `constructed inner container enfor the cement or other mate'- `rial, consistlng of a sheet lof paper or other suitable material folded upon itself a number of times to form a multiple-ply body having its bottom closed by extensions of-eachsuccessive ply folded over againstthe opposite sides alternately, and said inner container having the several Yplies and folded parts coated with a suitable impervious compoundn which performs the dual function of rendering the walls of the container impervious to moisture and cementing'the plies thereof together.

My invention also Pcomprehends other features of construction which, together with these above specified, will be better understood by which Figure 1 is an elevation of my improved bag with a portion broken away; Fig.-2 is a vertical section of the same on a larger scale with the central portion removed to shorten the height; Figs. 3 to 13, inclusive, are dia` grammat-ic plan views of the'prepared paper in the process ofmaking the container to'fbe inserted in the textile outer bag; and Fig.' letk is a similar view showing the' making of a modi'ed form of container embodying my invention. v

2 is) the textile bag or outer covering, and ma be formed of any coarse textile materia-l having strength and cheapness. Instead Vof using closely woven duck as heretofore, in cement bags, commonobaggingbf hemp or cheap material may be employed; and the Weave need not be close, as this outer text-ile covering is not required to prevent either reference to the drawings, Vin

.moisture entering or the materials from i o dusting throughits meshes. This outer textile bag is employed as a supporter for the inner prepared paper container in which the materials are packed, whereby the-package as a whole may beroughly handled without physical injury to the container.

The container 3 is formed of a paper sheet4 folded upon itself to provide a multiple ply bag and impregnated or coated between its plies .with a water-proof substance. The general preferred shape of the sheet 4, before being folded, is shown in Fig.` 3, and is rectangular except for the small corner 6 which may be cut out; that portion below the dotted line lconstituting the bottom folds, being slit als at 5I slightly to one side of the vertical lines of folding 7 The inner surfaces Y,of thel first two plies 9, 9, may be devoid ofwater-proong compound, but all ,other portions may be coated or impregnated 'with suoli a compound, as indicated at 8". In

self in this respect.

Aft-er the sheet has been prepared-asilo shown in Fig. 3, it is first folded on the vertical line y-g/ (Fig. 4) then the bottom flap is turned up to form the bottom and secured against the outer surface of one of the first plies 9 of the sides, t-he result being what is shown in Fig. 5. The sheet is again folded on the next folding line (Fig. 6),

and the bottom flap 10 so provided is folded upward to provide a second ply to the bottom, and said flap is secured tothe outer face of the side as shown in Fig. 7. This operation is continued until all of the sheet is folded .with the result that a multi-ply paper bag is formed having a reinforced bottom having a greater number of plies than the sides. lVhere the sides are of three ply, thebottom is of ve or six ply, as desired, and likewise, the lower portion of the sides are also of five or six ply, so that the completed bag is very strong and may be lifted or pulled around roughly with load Aand not be liable to rupture. It will further be observed that by having the slits 5 to one side of the folding lines y-g/, there is provided a closed corner l1 at every ply, and these closed corners are so formed that it is impossible to rupture them with any reasonable use.

The water-proofing material is preferably such that when applied to the paper it will enable the several plies or folded portions to stick together so as to make a strong and tight bag or container. -This material should not be brittle nor sticky at normal temperatures and I have found that an excellent Waterproofing material for use of my improved container may be made by mixing pulverized resin, mineral oil and turpentine. While I do not restrict myself as to the proportions of these ingredients,

' the rosin should be dissolved in the turpentine to form a thick paint, and as the rosin will become dry and brittle when the turpentine evaporates, it is necessary to incorporate with it enough mineral or other non-oxidizing oil or greasy substance which will prevent its becoming brittle and hard. The compound should retain flexible and elastic properties. The most satisfactory material to add is cheap mineral oil.

The oil present is only just suficient to make the rosin elastic instead ofbrittle, so -that it will not crack. This impervious mixture may be modified in practice and cheapened by additions of pitch or tar, but a purely sticky material could not be employed as it would enter the material put into the bags.

The water-proorlig material may be applied to one or both surfaces of the paper sheet before folding or during folding, or the paper may be thoroughly impregnated throughout with the compound before being folded. However, cheapness of construction is a most important factor as, in most cases, the bags are not returned to the manufacturer or distrlbuter.

Instead of having the slits 5 out of alineyassembled in the textile bag 2; said con-` tainer'preferably lits the textile bag snugly and the open end of said compound bag is gathered in and tied. If desired, the paper bag may be tied first and the textile bag tied over it, but I prefer to tie both the bag and container at t-he same time.

The details of construction may be modivfied without departing from the spirit of the invention as defined in the claims.

Having now described my invention, what I claim as vnew and desire to secure by Letters Patent is l. A container for shipping and storing deliquescent materials, which consists of an impervious multiple-ply bag of paper comprising a sheet of paper coated with a pliable or non-brittle Water-proof cementing compound and folded on `parallel lines to -provide a body having adhering multipleply side walls and the lower extensions of the body side plies lrespectively 4folded over upon opposite sides of the body to provide a multiple-ply closed bottom, and each of said extensions arranged between the adjacent'plies of the sides of the body, the various piles of the body and bottom portions being firmly secured together throughout their'entire surfaces and made impervious to `moisture by the presence of the waterproof cementing compound and the bag as a whole normally pliable.

2. A ywater-proof bag or container for packing and transporting deliquescent material, which consists of a bag-like structure formed of a sheet of suitable material coated with a water-proof normally pliable cementing compound and having one edge split at a plurality of points to form a row of separate tabs of shorter length than.- the length of the bag or container said coated material being folded on lines transverse to the length of 'the material toprovide a plurality of superposed-,\ and adhering plies forming multiple-ply sides, s aid folds extending longitudinal of the respective tabs and relatively close to one of their edges, the folded tabs of the plies of the two sides folded over alternately to overlap each other and forming a bottom composed of a plurality of adhering plies and closed corners and the respective ends of said tabs extending between and adhering/ adjacent side plies, the In testimony of .which invention, I here- Whole forming a, bag'or container in 'which unto set my hand.

the entine/sidefplies and bottom-tabs are al1 united/ to form continuous pliable impervi- MAXIMILIAN SMTANA 5 ous wallsg to constitute an impervious ad- Witnesses:

hel-ing multiple-ply structure with multiple- R. M. HUNTER, ply corners. R. M. KELLY. 

